Forums - Segmentation Fault while running X11 Display Server?

Hi all,

I'm trying to run X11 on the Qualcomm RB5. I am using the version of X that comes with Ubuntu 18.04, as installed via `apt` on the device. This RB5 unit is running the stock firmware that it came with.

Package: xserver-xorg-core
Architecture: arm64
Version: 2:1.19.6-1ubuntu4.9
Priority: optional
Section: x11
Source: xorg-server
Origin: Ubuntu

When I run this command:

/usr/bin/X -verbose 99

There is a segmentation fault:

X.Org X Server 1.19.6
Release Date: 2017-12-20
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.15.0-140-generic aarch64 Ubuntu
Current Operating System: Linux qrb5165-rb5 4.19.125 #1 SMP PREEMPT Sat Mar 20 11:48:10 CST 2021 aarch64
Kernel command line: rcupdate.rcu_expedited=1 rcu_nocbs=0-7 kpti=off noinitrd console=ttyMSM0,115200,n8 earlycon=msm_geni_serial,0xa90000 androidboot.hardware=qcom androidboot.console=ttyMSM0 androidboot.memcg=1 lpm_levels.sleep_disabled=1 video=vfb:640x400,bpp=32,memsize=3072000 msm_rtb.filter=0x237 service_locator.enable=1 androidboot.usbcontroller=a600000.dwc3 swiotlb=2048 loop.max_part=7 cgroup.memory=nokmem,nosocket reboot=panic_warm net.ifnames=0 apparmor=1 security=apparmor root=/dev/sda7 androidboot.bootdevice=1d84000.ufshc androidboot.serialno=ZTR10S1600CS androidboot.wifimac=F074E41057C2 androidboot.btmac=F074E41055BA androidboot.baseband=apq msm_drm.dsi_display0=qcom,mdss_dsi_ext_bridge_1080p: systemd.setenv="SLOT_SUFFIX=_a" skip_initramfs rootwait rw init=/sbin/init
Build Date: 08 April 2021  01:53:49PM
xorg-server 2:1.19.6-1ubuntu4.9 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.34.0
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Wed May 19 05:16:09 2021
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(==) No Layout section.  Using the first Screen section.
(==) No screen section available. Using defaults.
(**) |-->Screen "Default Screen Section" (0)
(**) |   |-->Monitor ""
(==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
(==) Automatically adding devices
(==) Automatically enabling devices
(==) Automatically adding GPU devices
(==) Automatically binding GPU devices
(==) Max clients allowed: 256, resource mask: 0x1fffff
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/Type1" does not exist.
Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
Entry deleted from font path.
(WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
Entry deleted from font path.
(==) FontPath set to:
/usr/share/fonts/X11/misc,
built-ins
(==) ModulePath set to "/usr/lib/xorg/modules"
(II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
(II) Loader magic: 0x55889e4010
(II) Module ABI versions:
X.Org ANSI C Emulation: 0.4
X.Org Video Driver: 23.0
X.Org XInput driver : 24.1
X.Org Server Extension : 10.0
(--) using VT number 2

(II) systemd-logind: logind integration requires -keeptty and -keeptty was not provided, disabling logind integration
(II) xfree86: Adding drm device (/dev/dri/card0)
(II) no primary bus or device found
falling back to /sys/devices/platform/soc/ae00000.qcom,mdss_mdp/drm/card0
(II) LoadModule: "glx"
(II) Loading /usr/lib/xorg/modules/extensions/libglx.so
(II) Module glx: vendor="X.Org Foundation"
compiled for 1.19.6, module version = 1.0.0
ABI class: X.Org Server Extension, version 10.0
(==) Matched modesetting as autoconfigured driver 0
(==) Matched fbdev as autoconfigured driver 1
(==) Assigned the driver to the xf86ConfigLayout
(II) LoadModule: "modesetting"
(II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
(II) Module modesetting: vendor="X.Org Foundation"
compiled for 1.19.6, module version = 1.19.6
Module class: X.Org Video Driver
ABI class: X.Org Video Driver, version 23.0
(II) LoadModule: "fbdev"
(II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
(II) Module fbdev: vendor="X.Org Foundation"
compiled for 1.19.3, module version = 0.4.4
Module class: X.Org Video Driver
ABI class: X.Org Video Driver, version 23.0
(II) modesetting: Driver for Modesetting Kernel Drivers: kms
(II) FBDEV: driver for framebuffer: fbdev
(II) modeset(0): using drv /dev/dri/card0
(WW) Falling back to old probe method for fbdev
(II) Loading sub module "fbdevhw"
(II) LoadModule: "fbdevhw"
(II) Loading /usr/lib/xorg/modules/libfbdevhw.so
(II) Module fbdevhw: vendor="X.Org Foundation"
compiled for 1.19.6, module version = 0.0.2
ABI class: X.Org Video Driver, version 23.0
(EE) open /dev/fb0: No such file or directory
(II) modeset(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
(==) modeset(0): Depth 24, (==) framebuffer bpp 32
(==) modeset(0): RGB weight 888
(==) modeset(0): Default visual is TrueColor
(II) Loading sub module "glamoregl"
(II) LoadModule: "glamoregl"
(II) Loading /usr/lib/xorg/modules/libglamoregl.so
(II) Module glamoregl: vendor="X.Org Foundation"
compiled for 1.19.6, module version = 1.0.0
ABI class: X.Org ANSI C Emulation, version 0.4
(II) glamor: OpenGL accelerated X.org driver based.
MESA-LOADER: failed to open msm_drm (search paths /usr/lib/aarch64-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: msm_drm
(II) glamor: EGL version 1.4:
EGL_MESA_drm_image required.
(EE) modeset(0): glamor initialization failed
(II) modeset(0): ShadowFB: preferred NO, enabled NO
(II) modeset(0): Output DSI-1 has no monitor section
(II) modeset(0): Output DP-1 has no monitor section
(II) modeset(0): Up to 2 crtcs needed for screen.
(II) modeset(0): Allocated crtc nr. 0 to this screen.
(II) modeset(0): Allocated crtc nr. 1 to this screen.
(II) modeset(0): Allocated crtc nr. 2 to this screen.
(II) modeset(0): Allocated crtc nr. 3 to this screen.
(II) modeset(0): EDID for output DSI-1
(II) modeset(0): EDID for output DP-1
(II) modeset(0): Output DSI-1 disconnected
(II) modeset(0): Output DP-1 disconnected
(WW) modeset(0): No outputs definitely connected, trying again...
(II) modeset(0): Output DSI-1 disconnected
(II) modeset(0): Output DP-1 disconnected
(WW) modeset(0): Unable to find connected outputs - setting 1024x768 initial framebuffer
(==) modeset(0): Using gamma correction (1.0, 1.0, 1.0)
(==) modeset(0): DPI set to (96, 96)
(II) Loading sub module "fb"
(II) LoadModule: "fb"
(II) Loading /usr/lib/xorg/modules/libfb.so
(II) Module fb: vendor="X.Org Foundation"
compiled for 1.19.6, module version = 1.0.0
ABI class: X.Org ANSI C Emulation, version 0.4
(II) UnloadModule: "fbdev"
(II) Unloading fbdev
(II) UnloadSubModule: "fbdevhw"
(II) Unloading fbdevhw
(==) Depth 24 pixmap format is 32 bpp
(==) modeset(0): Backing store enabled
(==) modeset(0): Silken mouse enabled
(II) modeset(0): RandR 1.2 enabled, ignore the following RandR disabled message.
(EE) 
(EE) Backtrace:
(EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x5c) [0x558898a734]
(EE) 
(EE) Segmentation fault at address 0x0
(EE) 
Fatal server error:
(EE) Caught signal 11 (Segmentation fault). Server aborting
(EE) 
(EE) 
Please consult the The X.Org Foundation support 
at http://wiki.x.org
 for help. 
(EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
(EE) 
(EE) Server terminated with error (1). Closing log file.
Aborted

How can I enable the X11 display server on this board?